A bunch of bananas to Channel 4 for its tireless investigation into war crimes and crimes against humanity committed in Sri Lanka. Its contribution was recognised on Tuesday by the UN's independent investigator on extrajudicial killing, Christof Heyns, who said previous Channel 4 coverage had exposed "definitive war crimes". As a result, on Friday Channel 4's latest investigation, Sri Lanka's Killing Fields, will be exclusively premiered at the UN. It will be screened at an Amnesty International event at the UN Human Rights Council session in Geneva. The footage is described by Channel 4's news and current affairs boss, Dorothy Byrne, as "probably the most horrific the channel has ever shown" and will be aired on 14 June. It surely fits in with Channel 4 chief executive David Abraham's ambition for the broadcaster to "stimulate debate, take risks and be brave".